Products by Attribute block doesn't persist the current values when clicking on edit button

[Aljullu]

To reproduce

Steps to reproduce the behavior:

1. Add a Products by Attribute block.
2. Select some attributes and click on Done.
3. Click on the pencil icon to edit the block again.
4. Notice the attributes you previously selected are not checked by default, so it's easy to forget what was your previous attribute selection.

Expected behavior

When clicking on the edit button, the currently selected attributes should be checked by default, like it happens with the Products by Category block, for example.

Screenshots